The Roebic Leach and Drain Field Treatment helps to rapidly break up clogged or sluggish drain fields the primary reason for septic system failure, and restore proper drainage. With a concentrated and easy-to-use formula, this drain treatment can treat a large 1500-gallon septic tank for up to 1 year. Powerful Roetech enzyme-producing bacteria that degrade protein, starches, and other food-related organic debris to increase flow.